99890646 has 8 divisors (see below), whose sum is σ = 199781304. Its totient is φ = 33296880.

The previous prime is 99890627. The next prime is 99890647. The reversal of 99890646 is 64609899.

It is a sphenic number, since it is the product of 3 distinct primes.

99890646 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99890647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8324215 + ... + 8324226.

It is an arithmetic number, because the mean of its divisors is an integer number (24972663).

Almost surely, 2^99890646 is an apocalyptic number.

99890646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99890646 is a wasteful number, since it uses less digits than its factorization.

99890646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16648446.

The product of its (nonzero) digits is 839808, while the sum is 51.

The square root of 99890646 is about 9994.5308043950. The cubic root of 99890646 is about 463.9896295492.

The spelling of 99890646 in words is "ninety-nine million, eight hundred ninety thousand, six hundred forty-six".